Automatic propeller.



R. B. KELLOGG. AUTOMATIC PROPELLBR; Arrmonxon rump 00-1221, 191o.

Patentedj lug. 20, 1912.

I INVENTOR Ra yE.KeLZO 9 9.

Attorney an! 'n. xnLLooo, o1" NEEDLES, oamroamal AUTOMATIC PROPELLER.

Specification of Letters Patent.

Application m October 21, 1910. Serial in. 588,842.

To all whom it may concern:

Be it known that I, RAY E. KELLOGG, citizen of the United States, and'residing at Needles, in the county of San Bernardlno and State of California, have invented certain new and useful Improvements in Automatic. Propellers, of which the followlng is a specification.

My invention relates to improvements in propellers for aerial propulsion,vor for use in connection with vessels for water navigation.

' The invention has for its object to provide for controlling or regulating the pitch or angle of the propeller-blades in accordance withthe speed or flight ofthe aeroplane, and thus roviding for equalizing or proportioning t e air-pressure upon the propeller-blades with the centrifugal force.

A further object of the invention is to carry out the aforesaid end in a simple,

inexpensive and effective manner.

The invention consists, primarily, of certain instrumentalities or features substantially as hereinafter fully disclosed and defined by the claims.

In the accompanying drawing, illustrating the preferred embodimentor disclosure of my invention, which disclosure may be changed or varied as circumstances or conditions may suggest, without departing from the spirit thereof,Figure 1, is a-view in elevation of the invention, partly in section. Fig. 2, is a transverse section produced through one of the blades or wings of a propeller. Fig. 3, is a detail view, showing a modified or differential form of propellerblades, including centrifugal ball governors therefor, the blades being shown in end elevation. Fig. 4, is a'plan view of another form of the disclosure of my invention."

Fig. 5, is alike view ofanother disclosure 5 L The springs 9, when compressed by the outor modification of the invention.

In practising my invention, I apply to the usual driving or main shaft',.-'-1, of the motor (not shown) a transverse shaft. 2, having formed centrally thereof a sleeve, or circular formation 3, for the reception of the main-shaft,-and upon which shaft said sleeve is tightly fitted or.,;fixed as will be learned from Fig. 1. Blades or wings 4-4,

' are each formed with a longitudinal tubule formation or passage 5, receiving the trans-f verse shaft 2, said blades or wings being arranged upon opposite sides of the sleeve 3, or; point of intersection .of the shaft 1,

with the transverse shaft 2, and adapted to turn thereon a greater or less extent by carrying their angle of presentation to the as clearly disclosed in Fig. 1, the greater" or Wider cross-sectional blade-portions forming the follow sides or-rear of the blade, as relates to the direction of rotation, as indicated by the arrowin Fig. 1. The blades or wings and their carrying. shaft have spiral-threaded connection, as indicated at 6 and 7 and the shaft2 is likewise provided with springs 8 which operate between loose washers 9 and adjusting nuts 10 on the shaft, and thus hold the wings 4 yieldably Patented Aug. 20, 1912.

in their inner position, whereby during the a rotation ofsaid shaft said wings of blades, by reason of centrifugal action, will have a llmited independent turning movement upon their carrying shaft and thus provide for changing the angle of presentation of said blades or wings, to the air-pressure. This has the result of controlling or regulating such angle of presentation or .pitch of said blades accordlng to the speed or flight of the aeroplane, consequently providing for equalizing or proportioning the air-pressure upon said blades orwings to the centrifugal force, which automatic adjustment is requlsite for the perfect manipulation or' 'handling of the aeroplane in transit or flight.

decreased and their pressure thus controlled upon the wings or blades.

In Fig. 3, are shown duplicate blades or wings 11, pivotally connected as at 12, to opposite sides of a collar or sleeve 13, fixed to the motor or driving shaft 1, said blades or wings being formed similar to the blades or wings shown in Figs l and 2, and having rigidly connected thereto, near their outer angles to the motor-driven shaft 1 and this movement is resisted by the centrifugal force exerted by the weights 18 and thus the pitch is equalized. The blades being revolved as they move very' rapidly through the air as the forward speed increases the resistance on the blades decreases as the balls 18 will be moved farther apart until the resistance is again equal to the pull of the blades. In the form of the invention illustrated i Fig. 4, the blades or Wings have arms or links 20 connected to their inner ends at 19, at diagonally opposite corners thereof, and with fixed ball or weight members 21 connected thereto, the motor-shaft l, in this instance having a T coupling or union connection 22, with the shaft 2. By means of this arrangement, is provided a propeller adapted to maintain the same thrust or pull, with the same number of revolutions at different speeds through the air. In Fig. 5, is illustrated a form of the invention adaptedmore especially for use in connection with a boat or water navigation, and in this arrangement of the device a main or motor-shaft 1, has appliedthereto a tubular shaft or sleeve 23, slidable thereon and arranged in connection with a centrifugal governor 24, connected to said motor or main shaft. Said tubular shaft-or sleeve 23, is upheld at one end and passed through a shorter sleeve or collar 24, having fixed thereto, or integral therewith, a disk-member 25', suitably abutting or fitting the inside of the stern of the vessel, the sleeve or collar 24:, being adapted to pass through the vessel shell at the stern and also through the sleeve 23, extending beyond said collar and the vessel shell. Propellers 25, are pivoted to the motor or main shaft 1, at one end of the latter, and are connected, at the inner ends of their shorter arms to the outer ends of links 26, whose opposite ends are connected to the slidable sleeve or shaft 23, at its' rear end.

' Having thus described my said invention,

shaft, a

what I claim as new and''- desire to secure by United States Letters Patent, is

1. A device of the class described, com: prising a motor driven shaft, other shafts extendlng) transversel of baid motor driven lade rotatahl transverse shafts, a spiral threaded connection between each of said blades and its shaft, and resilient means operating to maintainv said blades yieldably in normal position.

2. A device of the class described, comprising a motor driven shaft, other shafts rotatable with said motor' driven shaft, a

blade rotatable upon each of said other shafts, a spiral threaded connection between each of said blades and its shaft, and resilient means operating against each of said blades to automatically return the blades to normal position when the speed decreases.

3. A device of the class described, comprising a motor driven shaft, othershafts rotatable with said motor driven shaft, a blade rotatable upon each of said othershafts, a spiral threaded connection between each of said blades and its shaft and holding the blades normally with their least pitch presented to the direction of motion under relatively slow speed and causing the pitch to be increased when speed is increased, and resilient means operating vto maintainthe blades yieldably in normal position and to autqmatically return them to normal position when the speed is decreased.

4. A propeller comprising a motor-shaft,

blades or wings, shafts carrying said wings,

e upon each of said 5. A propeller comprising a motor-shaft, i--

blades or wings, a shaft carrying said 'blads' or wings, screw-threaded connection between each of said blades and its shaft adapted to allow them to be set at-an'angle to the pressure delivered thereon, and springs applied to said wings or blades and their carrying.

shaft, and adjusting nuts engaging said springs,'said springs operating to maintain the blades yieldably in normal position and to automatically return them to normal position when the blade is decreased.

In testimony whereof I aflix my signature in presence of two witnesses;

RAYE. KELLOGG.

Witnesses: I

WALTER E. PACKARD, 'Jno. R'McConmcx. 

